Expressions & Equations

Expressions & Equations

Expressions & Equations

• An expression is a math sentence WITHOUT an equal sign.

• An equation is a math sentence WITH an equal sign.

Poll

4x + 3 - 2y

• Expression

• Equation

Poll

6x + 7 = 31

• Expression

• Equation

Poll

x = 5

• Expression

• Equation

Poll

8f + 3 - t

• Expression

• Equation

Terms

• Terms are numbers and/or variables separated by operations symbols (+, - , x, ÷)

Poll

How many terms: 3x + 5 - 4t

• 0

• 1

• 2

• 3

Multiple Choice

Which of the following is a term?

• 4 + 3s

• e = 6

• 5x

• r + 5 - 2r

Variables, Coefficients & Constants

• A variable is a letter that represents an unknown value

• A coefficient is a number directly in front of a variable. It is being multiplied by the variable.

• A constant is a number that is not connected to any variables.

Poll

Which is the constant? 5x + 4

• 5

• x

• 4

Poll

Which is the variable? 6k - 8

• 6

• k

• 8

Poll

Which is the coefficient? 7r + 12

• 7

• r

• 12